I do like the appeal of having him be a normal, super famous guy and having to deal with Zhongli's mafia weirdness but it'd make so much more sense to have him with a side job.

What about the concept where he starts off normal but through some events ends up as Zhongli's like... bodyguard or something? Realizes he actually likes killing things outside of video games. It's just an idea but I think it could be really fun! Also it would mean him getting even more possessive over Zhongli (he's my boss but also he's really pretty.. etc) and always wanting to do what he can to make sure nobody can harm him.

It's just a couple of things but it's a start :>